jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.
jsperf.com URLs are mirrored at the same path, e.g:
https://jsperf.com/negative-modulo/2
Can be accessed at:
https://jsperf.app/negative-modulo/2
<div class="parent">
<div class="parent">
<div class="parent">
<div class="child">
<div class="grandchild" id="grandchild">
</div>
</div>
</div>
</div>
</div>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script>
function upTo(el, tagName, count) {
var el;
var count = count? --count : 0;
tagName = tagName.toLowerCase();
do {
el = el.parentNode;
if (el.tagName && el.tagName.toLowerCase() == tagName) {
if (!count) {
return el;
}
--count;
}
} while (el.parentNode)
}
</script>
Ready to run.
Test | Ops/sec | |
---|---|---|
.parents('.parent:first') |
| ready |
.closest('.parent') |
| ready |
$($()[0]) |
| ready |
POJS - first parent |
| ready |
POJS - 4th div parent |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.